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SCHEMATIC DIAGRAMS-6 (PART-6)
AMP.(CLASS-A) SECTION
ADJUSTMENT OF IDLING CURRENT
[NOTES]
1
1. Set R6040 6046 to minimum position before POWER ON.
2. Equip series 1/4W 100-ohm resisters near the terminal respectively in the each poles of the jig used for
P6080-6086 terminals.
[PROCEDURES]
1. Set the voltages at P6080 6082 to 2.5mV by adjusting R6040 6042, under the condition of
no input and no load, immediately after POWER ON.
2. Set the voltages at P6083 6086 to 1.5mV by adjusting R6043 6046, under the condition of
no input and no load, immediately after POWER ON.
3. Re-adjust by following procedure after 4
6 minutes of heat running.
L/ C/ R
SL/ SR/ SBL/ SBR
Below
9mV
9mV
Below
6mV
6mV
Between 9 11mV
Leave it as it is.
Between 6 8mV
Leave it as it is.
Over
11mV
11mV
Over
8mV
8mV
2
3
4
5
C
D
BACLA-1130
U0020
APLIFIER PC BOARD
CLASS-A
CODE
MODEL
T3
TX-SR313
H39
HT-R391
FL
H35
HT-R358
H55
HT-R558
H43
HT-RC430
H59
HT-R591
T4
TX-NR414
H75
HT-R758
T5
TX-NR515
H46
HT-RC460
R5000
C5010
-0.2V
R5020
7
-0.2V
H79
8
1.5K
47/50
330
HT-R791
D2
DTR-20.4
Q5030A
R5040
2.2K
-48.9V
FR
R5001
C5011
-0.2V
R5021
7
8
1.5K
47/50
330
-0.2V
R5041
Q5031A
2.2K
-48.9V
1
C
2
P6010A
R5002
C5012
-0.2V
7
R5022
8
1.5K
330
-0.2V
47/50
3
R5042
Q5032A
2.2K
-48.9V
4
3
2
1
P5509B
TX-SR313/ 414/ 515/ 515AE/ HT-R358/ 391/ 558/ 591/ 758/ 791/ HT-RC430/ 440/ 460/ DTR-20.4
E
54.4V
10
+B1L
R6020
R5180
2.2
(1/4W)
(1/4W)
1.1V
Q6030
+BL
2SC5171
1
0.6V
NFL
9
+B1L
6
-B1L
5
R5030
120K
+BL
4
+BL2
3
R5230
-BL2
2
120K
TRIML
1
IDLING
ADJUST
-0.4V
R6040
2
2K
-0.6V
2
-BL
Q6040
3
-1.0V
2SA1930
R5190
(1/4W)
10
-B1L
-54.5V
54.4V
10
+B1R
R5181
R6021
(1/4W)
2.2
1.1V
(1/4W)
Q6031
+BR
2SC5171
1
0.6V
NFR
9
+B1R
6
-B1R
5
R5031
120K
+BR
4
+BR2
3
-BR2
2
R5231
120K
TRIMR
1
IDLING
ADJUST
-0.4V
2
R6041
2K
-0.6V
2
-BR
Q6041
3
2SA1930
-1.0V
R5191
(1/4W)
10
-B1R
-54.5V
54.4V
10
+B1C
R5182
R6022
(1/4W)
2.2
1.1V
(1/4W)
+BC
Q6032
2SC5171
1
0.6V
NFC
9
+B1C
6
-B1C
5
R5032
120K
+BC
4
+BC2
3
-BC2
2
R5232
120K
TRIMC
1
IDLING
ADJUST
2
R6042
2K
-0.6V
2
-BC
Q6042
3
2SA1930
-1.0V
(1/4W)
10
-B1C
-54.5V
R5192
4
3
F
G
54.4V
SL
R5183
1
R5033
120K
R5003
-0.2V
1
C5013
R5023
2
1.5K
47/50
330
-0.2V
R5233
120K
Q5033A
R5043
2.2K
-48.9V
2
3
R5193
(1/4W)
-54.5V
54.4V
SR
R5184
(1/4W)
1
R5034
120K
R5004
C5014
-0.2V
R5024
7
8
1.5K
47/50
330
-0.2V
R5234
120K
R5044
Q5034A
2.2K
-48.9V
2
3
R5194
(1/4W)
-54.5V
54.4V
SW
R5185
(1/4W)
H39,H35
SBL
1
T5,H59,H46,H79
R5035
120K
R5005
C5015
-0.2V
R5025
7
8
1.5K
47/50
-0.2V
330
R5235
120K
R5045
Q5035A
2.2K
-48.9V
2
3
R5195
(1/4W)
-54.5V
54.4V
SBR
R5186
(1/4W)
1
T5,H59,H46,H79
R5036
120K
R5006
C5016
-0.2V
7
R5026
1.5K
47/50
330
-0.2V
8
R5236
120K
R5046
Q5036A
2.2K
-48.9V
2
3
(1/4W)
2
1
P5507B
-54.5V
R5196
H
10
+B1SL
R6023
2.2
(1/4W)
(1/4W)
1.1V
Q6033
+BSL
2SC5171
0.6V
NFSL
3
+B1SL
7
-B1SL
6
+BSL
5
+BSL2
4
-BSL2
3
TRIMSL
2
1
IDLING
ADJUST
-0.4V
2
R6043
2K
-0.6V
-BSL
Q6043
2SA1930
-1.0V
10
-B1SL
10
+B1SR
R6024
2.2
(1/4W)
1.1V
Q6034
+BSR
2SC5171
0.6V
NFSR
9
+B1SR
6
-B1SR
5
+BSR
4
+BSR2
3
-BSR2
2
TRIMSR
1
IDLING
ADJUST
-0.4V
2
R6044
-0.6V
2K
-BSR
Q6044
-1.0V
2SA1930
10
-B1SR
10
+B1SBL
R6025
2.2
1.1V
(1/4W)
Q6035
+BSBL
2SC5171
0.6V
NFSBL
9
+B1SBL
6
-B1SBL
5
+BSBL
4
+BSBL2
3
-BSBL2
2
TRIMSBL
1
IDLING
ADJUST
-0.4V
2
R6045
2K
-0.6V
-BSBL
Q6045
-1.0V
2SA1930
10
-B1SBL
10
+B1SBR
R6026
2.2
(1/4W)
1.1V
Q6036
+BSBR
2SC5171
0.6V
NFSBR
9
+B1SBR
6
-B1SBR
5
+BSBR
4
+BSBR2
3
-BSBR2
2
TRIMSBR
1
IDLING
ADJUST
-0.4V
2
R6046
-0.6V
2K
-BSBR
Q6046
-1.0V
2SA1930
10
-B1SBR
Model No. TX-SR313/NR414/NR515,HT-R391/358/558/591/758/791/RC430/RC460,DTR-20.4
SCHEMATIC DIAGRAM (Part-6) AMP(CLASS-A) SECTION
2011.12.26
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